Across
- 1. Plant growth booster
- 5. Distinct group of living organisms
- 7. genetic transmission of characteristics
- 9. flexible skeletal tissue in sharks
- 11. primary energy source for plants
- 12. Appendages used for aquatic movement
- 13. Scientific study of microorganisms
Down
- 2. red blood cells carrying oxygen
- 3. Organ that produces digestive bile
- 4. hard protective layer of diatoms
- 6. Protective plates on fish skin
- 8. Cell group with shared function
- 10. Long digestive organ absorbing nutrients